I've long heard 'urban legends' of halachically observent Jews in Boston many years ago riding the train ('the T') on Shabbat. Does anyone have any written evidence of such a practice? (I'm not looking for the halachic reasoning, as per another question on this site, rather for evidence for a sociological phenomenon in the halachic Jewish community.)
I don't know about Boston, but I know that at one time Jews on the mainland in Hong Kong would take a ferry to the island where the synagogue was located. Instead of paying for the ferry as usual, they purchased tickets in advance. I have myself seen such a ticket and printed on it the words "only to be used by Jews on the Sabbath".